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Title: A subleading power operator basis for the scalar quark current

Abstract

Factorization theorems play a crucial role in our understanding of the strong interaction. For collider processes they are typically formulated at leading power and much less is known about power corrections in the λ << 1 expansion. Here we present a complete basis of power suppressed operators for a scalar quark current at O(λ2) in the amplitude level power expansion in the Soft Collinear Effective Theory, demonstrating that helicity selection rules significantly simplify the construction. This basis applies for the production of any color singlet scalar in qq¯¯ annihilation (such as bb¯¯→H ). We also classify all operators which contribute to the cross section at O(λ2) and perform matching calculations to determine their tree level Wilson coefficients. Furthermore, these results can be exploited to study power corrections in both resummed and fixed order perturbation theory, and for analyzing the factorization properties of gauge theory amplitudes and cross sections at subleading power.

Authors:
 [1];  [1]; ORCiD logo [1]
  1. Massachusetts Inst. of Technology, Cambridge, MA (United States). Center for Theoretical Physics
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1501476
Grant/Contract Number:  
SC0011090
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2018; Journal Issue: 4; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Effective Field Theories; Perturbative QCD

Citation Formats

Chang, Cyuan -Han, Stewart, Iain W., and Vita, Gherardo. A subleading power operator basis for the scalar quark current. United States: N. p., 2018. Web. doi:10.1007/jhep04(2018)041.
Chang, Cyuan -Han, Stewart, Iain W., & Vita, Gherardo. A subleading power operator basis for the scalar quark current. United States. https://doi.org/10.1007/jhep04(2018)041
Chang, Cyuan -Han, Stewart, Iain W., and Vita, Gherardo. 2018. "A subleading power operator basis for the scalar quark current". United States. https://doi.org/10.1007/jhep04(2018)041. https://www.osti.gov/servlets/purl/1501476.
@article{osti_1501476,
title = {A subleading power operator basis for the scalar quark current},
author = {Chang, Cyuan -Han and Stewart, Iain W. and Vita, Gherardo},
abstractNote = {Factorization theorems play a crucial role in our understanding of the strong interaction. For collider processes they are typically formulated at leading power and much less is known about power corrections in the λ << 1 expansion. Here we present a complete basis of power suppressed operators for a scalar quark current at O(λ2) in the amplitude level power expansion in the Soft Collinear Effective Theory, demonstrating that helicity selection rules significantly simplify the construction. This basis applies for the production of any color singlet scalar in qq¯¯ annihilation (such as bb¯¯→H ). We also classify all operators which contribute to the cross section at O(λ2) and perform matching calculations to determine their tree level Wilson coefficients. Furthermore, these results can be exploited to study power corrections in both resummed and fixed order perturbation theory, and for analyzing the factorization properties of gauge theory amplitudes and cross sections at subleading power.},
doi = {10.1007/jhep04(2018)041},
url = {https://www.osti.gov/biblio/1501476}, journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 4,
volume = 2018,
place = {United States},
year = {Mon Apr 09 00:00:00 EDT 2018},
month = {Mon Apr 09 00:00:00 EDT 2018}
}

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Cited by: 26 works
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Works referencing / citing this record:

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Diagrammatic resummation of leading-logarithmic threshold effects at next-to-leading power
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text, January 2018


Impact of Isolation and Fiducial Cuts on $q_T$ and N-Jettiness Subtractions
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